This mini metal servo is quite impressive, it does quite the job for a large range of tasks. With metal gear, it could gives you a 1.8kg*cm torque.
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MG90S 180° RC Micro Servo Motor
Analog Capacitive Gravity: Soil Moisture Sensor Corrosion Resistant, DFRobot:SEN0193, køb her 75,00 DKK
Feetech Micro Servo - FS90 180 Degree Rotation – CD-Soft
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SER0035 DFRobot $19.855/ 1 SPQ, 10 Original Parts in Stock - JAK Electronics
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9g Metal Gear Micro Servo (1.8Kg ) from MindKits New Zealand
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Feature, Working voltage is 4.8-6V, Built-in anti-blocking algorithm is more durable, Optimize the design of metal gears to make the operation more
Hiwonder LFD-01M Robot Servo 6V 14g Micro Servo Anti-blocking with Metal Gear
Gravity: Starter Kit for Arduino
Micro Servos Australia
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Buy Best Arduino Servo Motor and Robot Servo Motor Controller Online - page 1